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Unformatted text preview: STA 3024 Practice Exam 2 Name: UFID: • On the answer sheet at the back of the exam write your name, UFID, and ONLY the letter corresponding to your answer (do not show your work.) • A formula sheet, F table, and t table are provided on the last page. I promise not to cheat on this exam. I understand that accessing notes programmed into my calculator constitutes cheating. I also promise not to share information about the exam with people who haven’t taken it yet. Signature: 1. In the oneway ANOVA F test, which of the following would lead us to conclude that it’s reasonable that not all the population group means are the same? (A) a large pvalue (B) a decision to reject H (C) both (A) and (B) (D) neither (A) nor (B) 2. In the twoway ANOVA F test for interaction, the alternative hypothesis is that there is (A) interaction. (B) no interaction. 3. In the twoway ANOVA F test for interaction, which of the following corresponds to a small pvalue? (A) evidence that there is interaction (B) a large value of F AB (C) both (A) and (B) (D) neither (A) nor (B) 4. A twoway ANOVA F test for the main effect of Factor A yields a pvalue of 0.0022. Using α = 0 . 05, we (A) reject H , and we conclude that it’s reasonable that the response variable does not depend on Factor A. (B) reject H , and we conclude that the response variable depends on Factor A. (C) fail to reject H , and we conclude that it’s reasonable that the response variable does not depend on Factor A. (D) fail to reject H , and we conclude that the response variable depends on Factor A. 5. A oneway ANOVA F test yields a pvalue of 0.193. Using α = 0 . 05, we (A) reject H , and we conclude that some of the group population means differ. (B) reject H , and we conclude that it’s reasonable that all the group population means are the same. (C) fail to reject H , and we conclude that some of the group population means differ. (D) fail to reject H , and we conclude that it’s reasonable that all the group population means are the same. 6. Which of the following data sets would be most immediately suitable for oneway ANOVA? (A) Explanatory Response Subj. Age Hair color 1 22 Black 2 35 Red 3 26 Brown . . . . . . . . . n 23 Blonde (B) Explanatory Response Subj. Eye color Hair color 1 Brown Black 2 Green Red 3 Brown Brown . . . . . . . . . n Blue Blonde (C) Explanatory Response Subj. Age Income 1 22 $37,000 2 35 $56,000 3 26 $7,300 . . . . . . . . . n 23 $10,000 (D) Explanatory Response Subj. Eye color Income 1 Brown $37,000 2 Green $56,000 3 Brown $7,300 . . . . . . . . . n Blue $10,000 7. A oneway ANOVA with five groups yields the following ANOVA table (some items are missing): Source df SS MS Group 1.326 Error 4.905 0.327 Total One of the missing items is the total sum of squares. Calculate it....
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 Spring '08
 TA
 Statistics, twoway anova

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